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Results of a Field Test Using R-407C in Split System Heat Pumps
Abstract
This paper discusses the results of a field
test to determine implications of an R-407C
replacement of R-22.
A change of refrigerants precipitates other
changes in materials, component selection, and
processing. In addition, thermodynamic properties
are different. Consequently, the effects on
durability, thermal performance, humidity control,
servicing, and manufacturability were questioned.
The field test addressed many of these
questions. Anticipated changes in manufacturing
processes were implemented on the production line.
Contractors were educated on the differences in the
refrigerant. Data were obtained by refrigerant,
lubricant, and component tear down analysis.
Experiential information was derived from feed back
of contractors and home owners, as well as multiple
site visits.
Generally, the field test has demonstrated
that by following a few basic rules, the industry can
anticipate use of R-407C with satisfactory results.
However, the surprising appearance of a
contaminate precipitant indicates the need for more
investigation into long term effects.
Citation
Boyd, A. (1996). Results of a Field Test Using R-407C in Split System Heat Pumps. Energy Systems Laboratory (http://esl.tamu.edu); Texas A&M University (http://www.tamu.edu). Available electronically from https : / /hdl .handle .net /1969 .1 /6701.